The number of unpaired electrons in Mn2+(Z=25) is:
Correct answer: A. 5
- A. 5
- B. 4
- C. 3
- D. 2
Explanation
A is correct because Mn2+ (Z=25) has a 3d5 electron configuration. In a d5 configuration, there are 5 electrons in the d orbital, and since each orbital can hold a maximum of 2 electrons with opposite spins, there are 5 - 2*2 = 1 unpaired electron.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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